electromagnetic spectrum

Question 1

frequency and wavelength are ______ of each other

Answer 1

inverse

Question 2

when frequency is high, what is wavelength

Answer 2

low

Question 3

what is the order of the waves from low frequency to high

Answer 3

radio, microwave, infrared, visible light, ultraviolet, X-ray, Gamma ray

Question 4

what is the definition of electromagnetic radiation

Answer 4

a kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields vary simultaneously.

radiation in which electric and magnetic fields vary

Question 5

define wavelength

Answer 5

the distance between successive crests of a wave

from one crest to the crest of the next wave

Question 6

define frequency

Answer 6

the number of times a point on a wave passes a fixed reference point in one second.

Question 7

define electromagnetic energy

Answer 7

radiant energy that travels in waves at the speed of light.

Question 8

what is the unit for wavelength

Answer 8

meter

Question 9

what is the symbol for wavelength

Answer 9

λ

Question 10

what is the symbol for frequency

Answer 10

ν (greek letter nu, not english v)

Question 11

what is the symbol for energy

Answer 11

E

Question 12

what is the unit for frequency

Answer 12

Hertz (Hz)

Question 13

what is the symbol for speed of light

Answer 13

c

Question 14

how do you mathematically calculate speed of light

Answer 14

frequency * wavelength (c = λv)

Question 15

definition quantum

Answer 15

the amount of electromagnetic energy that can be transferred in one pulse

Question 16

define photon

Answer 16

a quantum of light = a “massless particle” of light

Question 17

define photoelectric effect

Answer 17

When light is shown on a metal surface electrons are produced from the surface — these emitted electrons are called photoelectrons

Question 18

what is wave-particle duality

Answer 18

light can behave as waves, but so can particles

Question 19

define spectrum

Answer 19

the characteristic wavelengths of electromagnetic radiation that is emitted or absorbed by an object or substance, atom, or molecule.

λ of electromagnetic radiation that is emitted or absorbed bymatter

Question 20

continuous vs line spectrum

Answer 20

A continuous spectrum contains all frequencies in equal intensity. A line spectrum contains only a few specific frequencies, or has frequencies that are of notably greater or lesser intensity than the rest.

Question 21

absorption vs emission spectrum

Answer 21

an emission spectrum has different coloured lines in the spectrum, whereas an absorption spectrum has dark-coloured lines in the spectrum.

Question 22

at what order of magnitude does visible light occur

Answer 22

400 - 700 nm

Question 23

lower energy = what length of wavelength

Answer 23

lower energy = longer wavelength